CN1980440B - Telephone handset, base and associated method for updating the software of the handset - Google Patents
Telephone handset, base and associated method for updating the software of the handset Download PDFInfo
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- CN1980440B CN1980440B CN2006101636382A CN200610163638A CN1980440B CN 1980440 B CN1980440 B CN 1980440B CN 2006101636382 A CN2006101636382 A CN 2006101636382A CN 200610163638 A CN200610163638 A CN 200610163638A CN 1980440 B CN1980440 B CN 1980440B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72406—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by software upgrading or downloading
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/727—Identification code transfer arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/72502—Cordless telephones with one base station connected to a single line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/08—Details of telephonic subscriber devices home cordless telephone systems using the DECT standard
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephone Function (AREA)
- Stored Programmes (AREA)
Abstract
The present invention relates to a telephone handset, a base and an associated method for updating the software of the handset. The communication base (1.11) comprises a radio interface (1.14) to communicate with a communication device (1.1) operating by means of a software application, a charger circuit (1.12) and a means (1.22) of detecting a new version of the software. The communication base comprises a means (1.23) for notifying the device, via the radio means, of the availability of the new software version and a means for transmitting the new software version to the device when the charger circuit (1.12) is connected to the battery (1.21) charging circuit (1.2) of the device.
Description
Technical field
The present invention relates to a kind of telephone handset, a kind of base and be used to upgrade the method for the software of this hand-held set.
The present invention relates to a kind ofly carry out the telephone operated hand-held set with software application, and a kind of when this hand-held set charges on base, can upgrade the base of described software.If this base links to each other with network, the software of telephone handset can pass through network, and receiving software upgrades.
The invention still further relates to a kind of method that loads the new software of hand-held set by base that is used to carry out.
Summary of the invention
Therefore, purpose of the present invention comprises a kind of communication base, and described base comprises: radio interface is used for and the communication apparatus communication of operating by means of software application; Charger circuit; And the device that is used to detect the redaction of software.
According to the present invention, base comprises: be used for by radio device, notify the device of new software version availability to equipment; And be used for when charger circuit links to each other with the battery charger of equipment, sending the device of new software version to equipment.
Unusual is that base can not pass through radio link, sends the redaction of software automatically.But base notifies new software version to use to hand-held set.Hand-held set keeps operating with current software version; Only when hand-held set links to each other with base by battery charger, download new software version.
According to an embodiment, the device that is used for sending to equipment new software version uses described charger circuit.
The mechanism that is realized is used the charging contact between base and the hand-held set, thereby does not have additional connector.Needn't ask the user to carry out any specific operation.Can use complete transparent way for the user, realize upgrading.The mechanism that is realized does not need to add any extra storer to hand-held set.The advantage of operating by charging circuit is, does not need extra storer temporarily to store new application program.In addition, also reduced the shared space that downloads significantly; Do not need to support to be used in particular for the radio protocol of the redaction of load software.
In one embodiment, the communication base comprises the device of the compatibility of checkout facility and new software.
In fact, be not hand-held sets of linking to each other of hypothesis all and base all with identical software version compatibility, and redaction can be only relevant with some hand-held sets.
According to an embodiment,, carry out communication by means of charger circuit by means of universal asynchronous receiver/transmitter communication protocol.
According to an embodiment, the communication base is the base that is used for family's wireless phone.
According to an embodiment, radio link is followed the DECT standard.
According to an embodiment, the communication base comprises interface towards communication network, is used to detect the redaction with downloaded software.
Purpose of the present invention also comprises a kind of communication facilities of operating by means of software application, and this equipment comprises and is used for radio interface, charging circuit and the user interface of communicating by letter with base.
According to the present invention, when base when equipment is notified new software version, this equipment comprises the device of the availability of the redaction that is used on user interface indication software.
Software is not downloaded automatically by Radio Link.But to the availability of hand-held set notice redaction.The user also can know whether redaction is available by the user interface of hand-held set.The user does not need to check whether redaction is available; Base carries out this checking automatically.
According to an embodiment, this equipment comprise be used for when charging circuit links to each other with the charger circuit of base, the device of the redaction of receiving software.
According to an embodiment, be used to receive the device use charging circuit of new software version.
According to an embodiment, equipment is telephone handset.
Purpose of the present invention also comprises a kind ofly to be used software application to carry out in the telephone operated hand-held set, is being used for the method for the redaction of downloaded software, and described hand-held set comprises and is used for radio interface, charging circuit and the user interface of communicating by letter with base.This method comprises the step that receives the information relevant with the availability of new software version from base.
According to the present invention, this method is included in the indication step of the availability of the new software of indication on the user interface of hand-held set.
According to an embodiment, this method comprise be used for when charging circuit links to each other with the charger circuit of base, the step of the redaction of downloaded software.
Purpose of the present invention also comprise a kind of with use software application to carry out in the base that the telephone operated hand-held set communicates by letter, be used for the method for the redaction of downloaded software.This base comprises the radio interface that is used for communicating by letter with hand-held set, charger circuit, towards the interface of communication network be used to detect the device of new software version.The method comprising the steps of: the redaction that detects software; Check whether hand-held set supports new software version; And availability from base to hand-held set that notify new software version by.
According to the present invention, when the charging circuit of hand-held set linked to each other with the charger circuit of base, this method comprised and is used to verify must upgrade the step of handset software and be used for redaction with software and downloads to step on the hand-held set.
According to an embodiment, this method comprises when the charging circuit that is used for hand-held set links to each other with the charger circuit of base, the step of the redaction of downloaded software.
According to an embodiment, download step occurs between the server and hand-held set on the network.
Description of drawings
With reference to the accompanying drawings,, understand better and show the present invention by means of following non-restrictive example and implementation, wherein:
Fig. 1 is according to the hand-held set of embodiment and the block scheme of base,
Fig. 2 is the functional diagram of hand-held set and base,
Fig. 3 is the figure that passes through the exchange of radio link between expression base and the hand-held set,
Fig. 4 illustrates the step of updating of software,
Fig. 5 shows the charger circuit of base,
Fig. 6 shows the charging circuit of hand-held set.
Embodiment
In Fig. 1, shown module is possible or may be not and the corresponding functional unit in differentiable unit physically.For example, these modules or wherein some can concentrate in the single component in groups, perhaps can constitute the function of same software.On the contrary, some modules can be made of the physical entity that separates.In different figure, identical reference number is represented same or analogous element.
Fig. 1 shows according to the hand-held set 1.1 of present embodiment and base 1.11.
Hand-held set 1.1 comprises the processor that is known as CPU 1.3, storer 1.10, radio interface 1.4 and the charging circuit 1.2 that is used for control store 1.5, and they are connected by internal communication bus 1.8.Storer 1.5 comprises application software 1.6.For example, the storer 1.10 that below is called bootstrap memory can be a flash memory, comprises starting software 1.7.When starting hand-held set, operation starts software on processor automatically.In the operator scheme of hand-held set, start software and check whether application software is complete.Then, start software with this software loading to processor, thereby make hand-held set in normal mode, use its all functions to operate, inter alia, these functions also comprise DECT agreement and application, user interface and telephone service.
Hand-held set also comprises user interface 1.9.In the present embodiment, user interface 1.9 comprises screen and keypad.Hand-held set also comprises the battery 1.21 that recharges by charging circuit 1.2, from base.Battery provides the hand-held set proper operation required energy.
Base 1.11 comprises the processor that is known as CPU 1.13, storer 1.15, radio interface 1.14, charger circuit 1.12, modulator-demodular unit 1.16 and the network interface 1.17 that is connected by internal communication bus 1.18.
Storer 1.15 comprises at hand-held set with at the identification module 1.21 of the software version of hand-held set support, at the detection module 1.22 of available new software version and the module 1.23 that is used to upgrade handset software, and update module also designs the availability that is used for to the redaction of hand-held set notice software.
Network interface makes base be connected to the network (ICP/IP protocol) of internet-type by the link of DSL type.Network interface can also be linked to telephone network with base, thereby can realize phone application.
In the present embodiment, radio interface and dect standard compatibility.Hand-held set is the DECT phone.
According to other embodiment, radio interface can with the WLAN (wireless local area network) compatibility of another type, for example with bluetooth or Wi-Fi operating such.
In the present embodiment, when base was connected by charging circuit with hand-held set, charging circuit was used as communication link between the two.The physical interface of charging circuit is made of 2 charging contacts, one in base, another is represented by symbol '+' and '-' in Fig. 1 in hand-held set.On this Physical layer, realize universal asynchronous receiver (UART) two-way exchange agreement, be also referred to as half-duplex.Flow on this link can meet or exceed 115kbps.In instructions, will be described further the primary physical layer.
Even be used for realizing that the agreement of the software upgrading on the hand-held set occurs also guaranteeing the integrality of software under the wrong situation in operation on the UART, and do not needing to add extra storer to hand-held set.Realize this agreement and the software of the control of network interface physically is stored in the bootstrap memory.With respect to the storer that contains application software, this bootstrap memory is very little.
Fig. 2 shows base 1.11 and hand-held set 1.1.Base is connected to network 2.1 by network interface 1.17, thereby can visit the server 2.2 that comprises new software version.In the present embodiment, the regular querying server of base is to detect available new software version.In another embodiment, but when new software version time spent server notification base.
Fig. 3 shows when base receives the information relevant with the availability of the redaction of used software of hand-held set or firmware, the exchange by radio link between base and the hand-held set.In these exchanges, hand-held set is in normal manipulation mode.
The redaction of software is not downloaded with default mode by base.The base inquiry is positioned at the server on the internet network, can use to determine new software version., owing to know that these hand-held sets may be different models, and support the version that differs from one another, so base inquiry hand-held set (3.2) can be subjected to the influence of redaction to determine whether some hand-held sets when new software version time spent but (3.1).Base is listed the tabulation (3.3) of relevant hand-hold machine, warns relevant hand-hold machine (3.4) then.Warning to hand-held set is the dialogue balloons that appears on the idle screen, wherein shown " upgrade available, install now? " when hand-held set is accepted, base will load new software.
At last, base will be made the decision (3.5) of upgrading hand-held set.That is, when hand-held set linked to each other with base, renewal will take place.
But when the redaction time spent that base is learnt software, base is not downloaded redaction automatically.Base will guarantee in advance that redaction is relevant with hand-held set.In another embodiment, base before checking whether hand-held set is affected, the new software of download version.
During the hand-held set of the redaction influence that is subjected to software was verified, base need be from the information of hand-held set, to set up the compatibility with the redaction of software.For each hand-held set, base is checked the identifier of hand-held set and the software version of being supported.In the present embodiment, the content that defines in the identifier of hand-held set and the dect standard is corresponding, and this content is international personal device identity code, is labeled as IPEI.
Fig. 4 shows when base has determined to continue to carry out renewal, the step of updating of software.
Renewal process is as follows:
Hand-held set links to each other with base by means of charging circuit.When hand-held set links to each other with base (4.1), base checks whether hand-held set is a part (4.2﹠amp that the hand-held set relevant with renewal tabulated really; 4.3).If hand-held set starts (4.4).Otherwise hand-held set does not upgrade, and keeps mode of operation (4.12),, is in normal manipulation mode that is.
After starting, the hand-held set that no longer is in normal manipulation mode in the time period that can be for example 100ms, the request message that waits for downloads (4.5).If in this time period, do not receive message, then do not upgrade, and check whole software (4.10).If the message of receiving (4.6) is then carried out the negotiation (4.7) of data transfer mode between base and hand-held set.For example, this comprises the type of determining hand-held set, the size of the application program that will download and the size of determining to send piece.
Send data (4.8﹠amp; 4.9).Data send carries out with continuous blocks.Hand-held set is verified the reception of each piece by confirming reception.
When having sent all pieces, check the integrality (4.10) of software.If mark (signature) is for negative, then hand-held set enters the condition of information that waits for downloads (4.5).If just be labeled as, then can start software (4.11).Then, hand-held set is operated (4.12) once more.
In another embodiment, when charging circuit connected hand-held set and base, used between the two communication link was different with charging circuit.For example, communication link can be a radio link.
The principle of operation of the communication interface by the battery charge contact between base and hand-held set is as follows: the processor of base is by the charger circuit of base, the charging voltage of control base.The processor of hand-held set is controlled the electric current that hand-held set is introduced by the charging circuit of hand-held set.
Fig. 5 and Fig. 6 show and use transistor and the base of resistor and the charger circuit of hand-held set.As shown in Figure 5, in the charger circuit of base, normally be low logic level from the signal CHARGER_DIALOG_ENABLE of base processor.So transistor Q4 is saturated, the result makes transistor Q1 saturated.Charging voltage (general value is 9V) is present between the positive contact and negative contact of base, and the UART of processor can be used for other function.Regardless of the battery charge of hand-held set, the transistor Q3 that ends makes the received signal CPU_UART_RXD of UART be in high level.
For sending data to hand-held set, processor switches to high logic level (on the value of 3.3V) with signal CHARGER_DIALOG_ENABLE.In this case, the output CPU_UART_TXD of the UART of processor (asynchronous serial port) control battery charging voltage.
For the transmission in the base, when the UART of base agreement was sent high level, charging voltage was present on the charging contact.That is, if CPU_UART_TXD is in high logic level, Q1 is saturated, and charging voltage is present on the contact of base.When the UART of base agreement was sent low level, the charging voltage on the charging contact was zero.That is, if CPU_UART_TXD is in low logic level, Q1 ends, thereby cuts off charging voltage.
For making base receive data, CPU_UART_TXD must be in high logic level, thereby charging voltage must exist.If hand-held set switch to fast charging current (general, be typically greater than 150mA, for example, 200mA), then the voltage on the terminal of resistor R 5 is enough to make Q2 saturated, thereby low level is sent on the input port of UART of processor (CPU_UART_RXD).If hand-held set switches to trickle (trickle) charging current (generally being lower than 50mA, for example 20mA), the voltage on the terminal of R5 is too low, and Q2 ends, and processor receives high level on CPU_UART_RXD.
For the charging circuit of hand-held set shown in Figure 6, when having charging voltage on the contact of base, the charging circuit of hand-held set produces high level on the UART of hand-held set.When not having charging voltage on the contact of base, the charging circuit of hand-held set produces low level on the UART of hand-held set.In other words, when having capacity voltage (greater than 6V) on the charging contact, the serial received signal UART_RXD of processor receives high logic level in the hand-held set.When charging voltage surpassed threshold level, 3V Zener diode CR10 made the voltage in this input of processor can not surpass 3V.When cutting off voltage, UART_RXD is in low level.
For sending on the hand-held set level, output UART_TXD ends transistor Q11, thus by Q12, and, only allowing battery charge by resistor R 13 (representative value is 120ohm) by Q13, this is the trickle charge on the 30mA magnitude.The low level of UART_TXD output place makes Q11, Q12 and Q13 saturated, thereby can battery be recharged enough high electric currents greater than 150mA (being set by the current-limiting resistor R4 in the base).
In other words, when the UART of hand-held set sent low level, the charging current of being introduced by hand-held set equaled fast charging current.When the UART of hand-held set sent high level, the charging current of being introduced by hand-held set equaled trickle-charge current.When the charging current of being introduced by hand-held set during greater than preset threshold (being approximately 100mA), the charger circuit of base produces low level on the UART of base.When the charging current of being introduced by hand-held set was lower than preset threshold, the charger circuit of base produced high level on the UART of base.
Therefore, the Principle of Communication between base and the hand-held set is as follows:
● when the transmitter of base is in high level, have 9V voltage on contact, this delivers to high level on the receiver of hand-held set.
● when the transmitter of base is in low level, cut off voltage, this is applied to low level on the receiver of hand-held set.
● when the transmitter of hand-held set when being high, the charging current of battery is low, and this delivers to high level on the receiver of base.
● when the transmitter of hand-held set when low, the charging current of battery be a height, this delivers to low level on the receiver of base.
Should be noted that and have only when base does not send (high (rest) level that keeps, charging voltage exists) that hand-held set could send data to base.This communication is semiduplex.
This mechanism provides the operation that charges normal of hand-held set outside the efficient communication time period.In fact, it is corresponding with the standard charging operation not having the situation of any transmission signal.
Claims (23)
- One kind communication base (1.11), comprising:Radio interface (1.14) is used for communicating by letter with the communication facilities of operating by means of software application (1.6) (1.1);Charger circuit (1.12);Be used to detect the device (1.22) of the redaction of software (1.6),Described communication base is characterised in that and comprises:Be used for notifying the device (1.23) of the availability of new software version to equipment by wireless mode,Be used for charging circuit (1.2) at charger circuit (1.12) and the battery (1.21) of equipment when linking to each other, send the device of new software version to equipment.
- 2. communication base according to claim 1 is characterized in that, is used for sending to equipment the device use charger circuit (1.12) of new software version.
- 3. communication base according to claim 1 is characterized in that, described communication base comprises the device (1.21) of the compatibility that is used for checkout facility and new software.
- 4. communication base according to claim 2 is characterized in that, described communication base comprises the device (1.21) of the compatibility that is used for checkout facility and new software.
- 5. communication base according to claim 2 is characterized in that, by means of universal asynchronous receiver transmitter communication protocol, carries out the communication by means of charger circuit.
- 6. according to the described communication base of one of claim 1 to 5, it is characterized in that described communication base is the base that is used for the family wireless phone.
- 7. according to the described communication base of one of claim 1 to 5, it is characterized in that radio link is followed the DECT standard.
- 8. communication base according to claim 6 is characterized in that radio link is followed the DECT standard.
- 9. according to the described communication base of one of claim 1 to 5, it is characterized in that described communication base comprises the interface (1.17) towards communication network, be used to detect redaction with downloaded software.
- 10. communication base according to claim 6 is characterized in that, described communication base comprises the interface (1.17) towards communication network, is used to detect the redaction with downloaded software.
- 11. communication base according to claim 7 is characterized in that, described communication base comprises the interface (1.17) towards communication network, is used to detect the redaction with downloaded software.
- 12. communication base according to claim 8 is characterized in that, described communication base comprises the interface (1.17) towards communication network, is used to detect the redaction with downloaded software.
- 13. communication base according to claim 1, it is characterized in that, described communication facilities comprises battery, described charger circuit comprises and is used for charging contact that battery is charged, and the device that is used to send new software version is set in use to send new software version by the charging contact of charger circuit.
- 14. communication base according to claim 4, its special type be, is used to check that compatible device is in the compatibility with new software download checkout facility and new software before the described communication base.
- 15. a communication facilities (1.1) of operating by means of software (1.6) comprising:Radio interface (1.4) is used for communicating by letter with base,Charging circuit (1.2),User interface (1.9),Described equipment is characterised in that, when base (1.11) when equipment is notified new software version, described equipment comprises the device that is used for going up at user interface (1.9) availability of the redaction of indicating software, and described equipment comprises and being used at the device of charging circuit (1.2) with charger circuit (1.12) redaction of receiving software when linking to each other of base.
- 16. communication facilities according to claim 15 is characterized in that, is used to receive the device use charging circuit (1.2) of new software version.
- 17., it is characterized in that described equipment is telephone handset according to claim 15 or 16 described communication facilitiess.
- 18. communication facilities according to claim 15 is characterized in that, described charging circuit comprises and is used for the charging contact that the battery to communication facilities charges, and described charging contact operation is used for making the new software that receives version by described charging contact.
- 19. the method for carrying out in the telephone operated hand-held set (1.1) at use software application (1.6), being used for the redaction of downloaded software, described hand-held set comprises:Radio interface (1.4) is used for communicating by letter with base,Charging circuit (1.2),User interface (1.9),Said method comprising the steps of:From the availability relevant information of base (1.11) reception with new software version,Described method is characterised in that, the indication step of the availability of the new software of indication on the user interface of hand-held set, and the step that is used for charging circuit (1.2) and charger circuit (1.12) redaction of downloaded software when linking to each other of base at hand-held set.
- 20. method according to claim 19, wherein, described hand-held set has battery with when described hand-held set is connected with the charger circuit of base and the electrical contact that electrically contacts of charger circuit, and described method comprises step: by one group of public electrical contact, new software version is loaded into described hand-held set and described battery is charged.
- 21. one kind with use software application (1.6) to carry out in the base that telephone operated hand-held set (1.1) communicates by letter, be used for the method for the redaction of downloaded software, described base comprises:Radio interface (1.14) is used for communicating by letter with hand-held set,Charger circuit (1.12),Towards the interface (1.17) of communication network,Be used to detect the device (1.22) of the redaction of software,Said method comprising the steps of:Detect new software version;Check whether hand-held set supports new software version;Notify the availability of new software version by base to hand-held set,Described method is characterised in that, when the charger circuit (1.12) of the charging circuit (1.2) of hand-held set and base when linking to each other, carries out following steps:Check the software that whether must upgrade hand-held set, andThe redaction of downloaded software when the charging circuit of hand-held set links to each other with the charger circuit of base.
- 22. method according to claim 21 is characterized in that, download step occurs between the server (2.2) and hand-held set (1.1) that is positioned on the network (2.1).
- 23. method according to claim 21, wherein, described hand-held set has battery, and described base has and be used for electrical contact that battery is charged, and the redaction of software is to download by the contact identical with the contact that is used for battery is charged.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0553731 | 2005-12-05 | ||
| FR0553731A FR2894420A1 (en) | 2005-12-05 | 2005-12-05 | TELEPHONE COMBINE, BASE AND ASSOCIATED METHOD FOR UPDATING COMBINE SOFTWARE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1980440A CN1980440A (en) | 2007-06-13 |
| CN1980440B true CN1980440B (en) | 2011-11-23 |
Family
ID=36928807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101636382A Expired - Fee Related CN1980440B (en) | 2005-12-05 | 2006-12-01 | Telephone handset, base and associated method for updating the software of the handset |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9191479B2 (en) |
| EP (1) | EP1793573B1 (en) |
| JP (1) | JP2007159120A (en) |
| CN (1) | CN1980440B (en) |
| BR (1) | BRPI0604937B1 (en) |
| FR (1) | FR2894420A1 (en) |
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| CN1980440A (en) | 2007-06-13 |
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| BRPI0604937B1 (en) | 2019-02-26 |
| JP2007159120A (en) | 2007-06-21 |
| EP1793573B1 (en) | 2012-11-07 |
| EP1793573A3 (en) | 2011-04-13 |
| EP1793573A2 (en) | 2007-06-06 |
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